A test method for impedance change of radio frequency coaxial cable
A radio frequency coaxial cable, impedance change technology, applied in the direction of material impedance, etc., can solve the problems of performance requirements, test methods and test devices that are not clearly specified for tensile strength, and achieve simple structure, improved accuracy, and strong operability. Effect
Active Publication Date: 2017-12-12
YANGTZE OPTICAL FIBRE & CABLE CO LTD +1
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Problems solved by technology
[0004] However, in the national standard for radio frequency cables GB / T 17737.1-2000 "Radio Frequency Cable Part 1: General Rules, Definitions, Requirements and Test Methods of General Specifications", §10.4 "Tensile Strength (Longitudinal Tensile)" is described as "under consideration "Medium"; that is, the performance requirements, test methods and test devices for tensile strength are not clearly specified
Therefore, there is not yet a test method and special equipment specially used for this performance test.
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[0044] The present invention will be further described below in conjunction with accompanying drawing.
[0045] Such as Figure 3-6 , present embodiment provides a kind of radio frequency coaxial cable impedance change test device, it comprises main frame 6 and the impedance analyzer that the characteristic impedance value of testing cable under test changes, and described main frame 6 comprises test platform 7 and is arranged on test The supporting columns 8 on both sides of the platform, the tested cable 5 is horizontally arranged above the test platform, a fixed clamping head is provided on one side of the main frame 6, and a movable clamping head is provided on the other side. The movable clamping head is connected to the force applying mechanism through the sliding seat 10, and the two ends of the measured cable 5 are respectively connected to the fixed clamping head and the movable clamping head, and a tension sensor 2 is arranged on the fixed clamping head. The tension...
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The invention discloses a radio frequency coaxial cable tensile strength test device and method, which comprises a main frame and an impedance analyzer for testing the change of the characteristic impedance value of the cable under test, and a fixed clamping device is arranged on one side of the main frame A movable clamping head is provided on the other side of the main frame, and the movable clamping head is connected with the force applying mechanism through a sliding seat, and a tension sensor is arranged on the fixed clamping head, and the tension sensor and the force value The monitor is connected. In the present invention, by setting a clamping mechanism, a force applying mechanism, a force value display, and an impedance analyzer, and monitoring the change of electrical properties caused by the change of the structure of the tested cable when it is stretched longitudinally, it reflects the tensile strength of the cable. strength.
Description
technical field [0001] The invention relates to a method for testing the impedance change of a radio frequency coaxial cable. Background technique [0002] A coaxial radio frequency cable is a cable with a coaxial structure that transmits electromagnetic energy in the radio frequency (several megahertz to several gigahertz) range. The structure is generally divided into inner conductor layer, insulating layer, outer body layer and sheath layer from the inside to the outside. Because of its good anti-interference and low attenuation, it has become a main form of wide application. [0003] During the installation and laying process of the RF coaxial cable, it must bear the longitudinal tension. The maximum longitudinal tensile force that the cable can withstand is the tensile strength. As a performance indicator of the mechanical and physical properties of radio frequency coaxial cables, tensile strength is an important content that must be considered in the structural desig...
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IPC IPC(8): G01N27/02
Inventor 陈建红
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD